Greasing-vent.



L. HLSERRY.

GREASING VENT.

APPLICATION FILED DEC. 3. 1914.

Patented Avg. will; 1915v 2 SHEETS-SMLEI I.

WITNESSES I INVENTOR- L. H SERRY.

GREASING VENT.

- APPLICATION FILED DEC. 3. i914.

1 1%8,5%5, htemedAug. 3, i915.

' i 2 suns-swan 2.

a? w gggssas INVENTiDR I i Y r a whoa irfmem 1 "Be it, known that I, LAWRENCE HnNnY a'i' i'esidh't of Canon City, in .the county of ino'ntg andin the State of Colorado have 1n ntejd new,,useful,and Improved reas of which the following is a speci- Si RY, amaze of the United States and pres {invention relates generally. to

cans f l r a ng m vip er otlic'rpbjectis to permit the grease beboot Fagin :V-F; v

inoth r, ob ect is toallow'the boot to remain stretched i1i ,i ts normal shape whereby it be better fille'dto capacity.

" 'cover for the .vent or aperture to vfacilitate;

the li htro duetion ofthe lubricant, to properly retir nsalne when closed and to exclude dust and. other foreign matter.

meansalof. applying the lubricant directly upon. themoving parts within, avoiding wasteand ineifective lubrication.

.,Anothr object is to provide a means-of holding-the cover of'the aperture secured thereto enabling. it .to successfully "withstzmd rapid moven ient and vibration.

Another objectis tosupportthe grease \"(;3.11t ,\Yll0l ly by and upon the flexible casing so asto. free the formerfrom undue vibrationsj..-, a

.St ll another obJectas to provide a means of.securely-holding the leather of the boot I fasttotheapertures exterior so as to reinforce the edges. of the hole pierced in the leather. a A- further object is to provide a fastening suitable to. hold the aperture tightly to the leather boot without cutting or chafi -ig the latter. 1 i A still furtherobject is to relieve the flexibleboot of undue strain by providing'an exceedingly light aperture and cover.

With the foregoing and other objects in EGREASING-VENT.

Specification of Letters Patent. l

application filed December 3, 1914. SerialNo. 875,254.

ntroduced without loosening the in.

. "Anotherf'bject- 1s toprovide a movable Another.. object is to provide a direct- W Ts ewe iram we e LAWRENCE anna? s am, OF canon CITY, oorpaano.

rammed sa e, isle.

will appear as the description proceeds, the invention resides principally in the combination, relation and arrangement of parts and in the detailed construction of the em- .bodiments herein disclosed in the accom- H 'panying drawings which form a part of this --specificat1on, in Which' Figure 1. is a perspective view otone em-' bodiment of the invention, showing a por-, tion of the leather ofthe greaseboot Fig. 2. is a cross section of .the embodiment illustrated in Fig: 1. Fig. 3. is a view in elevaf tion showing the application of the invention to a grease boot. incasing 'a' universal joint. Fig. 4. is the same "as Fig; 3, with theexception that the boot illustrated in this figure is adapted to inclose'a ball joint. Fig.- 5. is a cross section of another embodiment of the invention"showingthe cap removed from the basei Fig. is a perspective View of the cap and basedf an embodiment varying slightly from 'that'illustrated in Fig. 5; view of still another embodiment 0f 'the' invention herein disclosedfi F ig. 8 illustrates the top view of the rotarydisk or cap 'des ignated by'the numeral 81in Fig. 7, where it-is shown in cross-section.

The same embodiment is illustrated in both Fig. 1 and Fig. 2', and like parts are designated by the same numeral's'in both figures, however the cylindrical openingflOz forming the" aperture through which grease is introduced, and the'eXternally threaded Fig. 7 is a cross-section and top.

View which, with their resulting advantages,

collar 5 bounding said aperture'and having ting perforation -in the leatlierwall of the grease boot 6; a metallicgasket skis placed over the threaded end'of the collar .5 and held firmly against the leather 6 by means ofa cinch nut 3 engaging the, external threads of the 'collar- 5 thus affording agrease tight connection, reinforcing the edge of the perforation and iorn'ung a metallic rimmed aperture 10 through which a lub'ri- V cant may be introduced to the interior of the boot. A cylindrical cap 1 is fitted with internal threads to engage the externalthreads ,of the collar, 5 above the cinch nut 3 formmg a grease tight cover for the above men:-

I tioned aperture 10. The cap 1 isprovided with a set screw '2 for locking same in place and also with a groove 8 and a knurled edge 9 to facilitate turning the said cap.

In'Fig. 3 a grease boot of the usual type is shown, bound in place by the customary metallic bands 11' and 11; the grease vent may be located-at any suitableiplace on the leather casing 6 by making the necessary perforation and insertingthe parts as described above. This figure illustrates the grease vent in place upon the boot 6 near would be preferable to locate the grease vvent near the smaller end for several obvious reasons.

- In Fig. 4 the cap 1, set screw 2, cinch nut 3, and gasket 4 appear showing the prefer- -20 -f ordinary boot incasing a ball joint, the same held in place by the lacing 19;.

able location of the grease vent upon the e the ball joint should be made with a small oil hole facing the grease vent to insure proper lubrication.

A modified form of the invention is illustrated in Fig. 5, showing the cap removed from the base. In this form the cap 21 is externally threaded and provided with a number of small projections 22 about the periphery at the threaded end; the head of the cap being greater in diameter than the threaded end affords a shoulder-2T for the retention of a gasket 28. The base is internally threaded and is diaform in construction, being pressed to final shapeafter being mserted into the perforation in the.

leather 26. A spring wire 23 is rigidly fixed to the outside of the base and after a suitable curve to give it elasticity is bent at right angles near the aperture 20 and extends through a small hole 21 to the inside of the base 25 where it is again bent at right angles so as to terminate with an end 29 projecting into the aperture 20 in sucha manner as to engage the projections 22 of cap 21 when the latter is screwed into place. By a downward pressure upon the wire 23 the pro ecting end 29 is caused to disengage itself from the above mentioned 'projec tions 22 of the cap 21 allowing the latter to be turned freely; by releasing the pressure upon wire 23 when the cap 21 is in place the projecting end 29 rises'again between two of'the projections 22 securely locking the cap 21 to the base 25 and insuring the effective sealing of aperture 20.

In Fig. 6 thegrease vent is shown apart from the leather casing the construction varying slightly from that shown in Fig. 5 in that a different method is employed to lock the cap 17, it being provided with a crossbar'13 terminating at either end in a I right angled hook 18, this spring cross bar 13 is pivotedcentrally upon a rivet 16 butcap 31 the latter may 39 bringing the .perforation 34: 'in opposiis prevented from turning freely by a series of bosses 12 diametrically arranged about the center upon the face of the cap 17. The diaforni base 15 is provided with two loops 14 in positions diametrically opposed at such distance as to receive the right angled hooks 18 of the cross bar 13 when the cap 17 is screwed home into the base 15. After the hooks 18 are inserted into the loops 1-1 the cap is securely locked for the reason that the bosses 12 prevent the cap from turning without the cross bar. The cap can be again unlocked by prying-up the crossbar 13 and turning it backward until free from the loops then forward over them when unscrewing the cap; this construc-.

shown in a top view Fig. 8, it is provided.

with a central perforation 33 for therivet 39, Fig. 7, and a second perforation 3-1 located between the center and the circumferenc e and with a series of indentations 32 arranged in a line also between the center and the circumference. These indentations serve a triple purpose, they hold the revolving cap 31 pressed tightly against the outer disk 35, they produce friction sullicient to. hold the cap set where placed, and facilitate the turning of the cap with any pointed instrument. The circular dished disks 35 are similar to each other in shape and size and are provided with one central perforation 33 for the rivet 39 a second elongated perforation 34 corresponding in distance from the center with that of'perforation 34 in the revolving cap 31 as illustrated in Fig. 8. jand a series of perfora-' region marked 41 so as to fit snugly against revolving cap 31 which is centrally. riveted between them, but of less thickness than the surrounding leather 36 which is also riveted tightly between'them at their circumferences. Since the elongated perforations 3-1 are superimposed and the same distance from the center-as perforation 34 in cap 31, by revolving the latter these three perfdrations 34 and 34' may be made to exactly coiilclde affording an opening for the in- -troduction of a lubricant; b1, usinga pointed instrument in the indentations of the be revolved upom rivet tion to the perforations 34 and closing the hole, thus making a grease tight stopper.

Having thus fully described several embodiments of my invention, 1 claim 1. The combination of a grease boot having a greasing aperture comprising a erferation 1n the grease hoot rigidly boun 'by an annulus "engaging both. sides of the bordering walls to fasten said annulus in place and out of direct contact With incased inachinery, with a stopper .i'or the aperture of the annulus and means to secure said stopper. I

2. The combination of a flexible grease boot incasing moving parts said grease boot having a lubricant receiving hole pierced in the flexible Wall thereoffwith a rim of rigid material bounding said hole, and a movable lid fitted to above mentioned rim to close the hole and a device to secure the latter.

3. The combination of a grease boot having a bound aperture in its well, insulated from mechanical vibrations by the intervening 7 flexible parts of said boot, a stopper therefor, and a fastener to secure the latter.

LAWRENCE HENRY SERRY.

Witnesses E. M. COLLINS, G. V. Hon-am. 

